Air-cooled furnace wall



Nov. 27, 1928. 1,693,378

R. A. FORESMAN AIR COOLED FURNACE WALL Filed Dec 1924 RA. Foresmun WITNESSES:

INVENTOR ATTORNEY Patented Nov. 27, 1928.

UNITED STATES r 1,693,378 PATENT OFFICE.

ROBERT A. FORESMAN, F MOORE, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

AIR-COOLED FURNACE WALL.

Application filed December My invention relates to furnace walls and especially to he bridge wall at the rear of a furnace provided with an automatic stoker having refuse disposal mechanism of the dump grate type, although it is evident that my invention is a wide application and may be used in any other location in which walls are subject to high temperatures. 7

An object of my invention is to produce a wall of the type specified which shall be simple in construction, durable,inexpensive and easily maintained. Another object of my invention is to produce furnace wall in which the areaof the cooling surface shall a be relatively large with respect to the area of the wall exposed to the heat. \Vith. these objects in view and others, as will appear as the description proceeds, the invention comprises the various novel features of construction and arrangement of parts which will be more fully described hereinafter and set forth with particularity in the claims appended hereto.

In the accompanying'drawings, which lllustrate one embodiment of the invention, Fig. 1 is a vertical section through the refuse disposal apparatus and bridge wall of a furnace provided With a. progressive feed grate. Fig. 2 is a transverse section on the line II-II of Fig. l.

Referring to the drawings, 11 designates a fuel bed supporting grate of any conventional type provided with a pivotally mounted over-feed section or dump grate 12. If desired, the dump grate 12 may be provided with air-conducting passage 13 for supplying air to the fuel on the dump grate 12. )n the rear wall 1 1 is a rear dump grate 15 p1votally mounted in a casting 16. The rear dump grate 15 is preferably hollow and pro vided with an opening 18 registerlng with opening 19 in the casting 16 to permit the admission of air to the rear dump grate 15 from which it is discharged through suitable openings 21.

The rear bridge wall 14 is formed with a transverse opening 23 which is in communication with an air duct 24 for supplying air thereto. The side of the opening 23 adjacent the rear dump grate is lined with some material which will transmit heat readily to the air moving through the opening 23. The construction which I prefer, comprises an angular member 26 restlng on the dump grate sup- .sa porting casting 16. The side of the angle 3, 1924. Serial No. 753,585. 7

member in the opening 23, is slotted at 27 to receive a heat transmitting member 29 which is provided with a tongue 28 which fits the slot 27. The heat transmitting member 29 is provided with a large number of pylons 31 to increase the heattransmitting area. The upper end of the heat transmitting member is held against the wall 14 by means of a plurality of clamps 33 which are embedded in the masonry of the Wall at one end35 and engage the heat transmitting member at the opposite end 36. Intermediate the ends are holes etl to receive bolts 42 which also pass through the heat transmitting member 29.

It will thus be seen that I have produced a device in which air circulates through an opening in a furnace wall and which is provided with means for increasing the heat transmitting surface and which also admits cooling air directly to exposed portions, such, for example, as'the dump grate 15.

\Vhile I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications', without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is:

1. In a furnace provided with a rear dump grate, a casting for supporting said dump grate, an angle member resting thereon, a masonry wall exposed to the furnace and resting on one legof said angle member, an upstanding longitudinally extending heat transmitting member resting on the edge of the other leg of said angle member and abutting said wall, and a clamping member imbedded partially in said wall and engaging the upper portion of said heat transmitting member.

2. In a furnace wall having an air passage therethrough, the combination of an an 1e member, masonry resting on one leg of-t e angle member and exposed to the furnace, a heat transmitting member resting on the edge of the other legof said angle member and abutting the side of the wall remote from the furnace, said heat transmitting member being provided with protuberances, and clamping means for securing said heat transmitting member against the masonry.

3. In a furnace, the combination of a bridge wall exposed to the heat of the furnace and to the fuel in its final stages of combustion, said bridge wall being formed of refractory material and being provided with a passage extending lengthwise therethrough and spaced from the side thereof exposed to the burning fuel, heat-transfer means secured to the side ofthe passage nearest the furnace for dissipating heat from the exposed refrac torywall, a hollow dump grate structure pivotally supported from the bridge wall and having openings therein for supplying air to the furnace, said bridge Wall being provided with a second passage communicating with the first-named passage for supplying air both to the first-named passage and the dump grate.

4. Ina furnace, the combination of a bridge wall exposed to the heat of the furnace and to the fuel in its final stages of combuswith the first-named passage for supplying airbothto the first-named passage and the dump grate.

In testimony whereof, I have hereunto sub scribed my name this first dayof December, 1924. a

' ROBERT A; FORESMAN. 

